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Right Pointer Tolerances on Openings
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Tolerances on Openings of USA Standard Specifications
for Industrial Perforated Plate and Perforated Sheets.
Perforated Opening
Tolerance on Openings
Standard (metric) MM
USA Industrial Standard Inch
Additional Sizes Inch
Standard (metric) MM
USA Industrial
Standard Inch
125.00
5
...
±2.5
±0.100
...
...
4- 1/2"
...
±0.090
106.00
4- 1/4"
...
±2.1
±0.085
100.00
4
...
±2.0
±0.080
...
...
3- 3/4"
...
±0.075
90.00
3- 1/2"
...
±1.8
±0.070
...
...
3- 1/4"
...
±0.065
75.00
3
...
±1.5
±0.060
...
...
2- 3/4"
...
±0.055
63.00
2- 1/2"
...
±1.3
±0.050
...
...
2- 1/4"
...
±0.045
53.00
2- 1/8"
...
±1.1
±0.043
50.00
2
...
±1.0
±0.040
...
...
1- 7/8"
...
±0.038
45.00
1- 3/4"
...
±0.9
±0.035
...
...
1- 5/8"
...
±0.033
37.50
1- 1/2"
...
±0.8
±0.030
...
...
1- 3/8"
...
±0.028
31.50
1- 1/4"
...
±0.6
±0.025
...
...
1- 3/16"
...
±0.024
...
...
1- 1/8"
...
±0.023
26.50
1- 1/16"
...
±0.5
±0.021
25.00
1
...
±0.5
±0.020
...
...
15/16"
...
±0.019
22.40
7/8"
...
±0.46
±0.018
...
...
13/16"
...
±0.016
19.00
3/4"
...
±0.38
±0.015
...
...
11/16"
...
±0.014
16.00
5/8"
...
±0.32
±0.013
...
...
9/16"
...
±0.012
13.20
17/32"
...
±0.30
±0.012
12.50
1/2"
...
±0.28
±0.011
...
...
15/32"
...
±0.011
11.20
7/16"
...
±0.28
±0.011
9.50
3/8"
...
±0.28
±0.010
8.00
5/16"
...
±0.25
±0.010
6.70
17/64"
...
±0.25
±0.009
6.30
1/4"
...
±0.24
±0.009
5.60
7/32"
...
±0.24
±0.009
4.75
3/16"
...
±0.21
±0.008
4.00
5/32"
...
±0.19
±0.007
3.35
0.127
...
±0.17
±0.006
*
(1/8)
*
*
*
2.80
7/64"
...
±0.150
±0.006
2.36
3/32"
...
±0.135
±0.005
2.00
0.078
...
±0.125
±0.005
1.70
0.066
...
±0.110
±0.004
1.40
0.055
...
±0.100
±0.004
1.18
0.045
...
±0.085
±0.003
1.00
0.039
...
±0.070
±0.003
0.83
0.032
...
±60p.m
±0.002
0.71
0.027
...
±50p.m
±0.002
0.60
0.023
...
±45p.m
±0.002
0.50
0.020
...
±40p.m
±0.002

* Round holes only
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